Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec4337266b2cf4d…

MALICIOUS

PDF

62.9 KB Created: 2020-08-04 11:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9efa5b0b12d3aad4e20ce69066c06151 SHA-1: 1aeadd237df410ed6f00edfb22fe56a350079a02 SHA-256: 7ec4337266b2cf4d515c064020c2c125feb7383aeede0deaef3c6f724fd688d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent URL, https://ttraff.com/pify?keyword=acetilcisteina+600+bula+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be a lure for users seeking information, likely to redirect them to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=acetilcisteina+600+bula+pdf
    • http://files.readingroomnotes.com/uploads/1/3/0/9/130969896/lekuzoxusigi-jekugikixa-xazesikuledolur.pdf
    • http://files.jenasawyer.com/uploads/1/3/2/3/132303170/dibotam.pdf
    • http://files.diaryofadesitck.com/uploads/1/3/1/3/131380001/fakus.pdf
    • http://files.carolinevanthoff.com/uploads/1/3/2/6/132696465/veniwulaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/kinobibajej.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/mimorak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/23749920150.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/29859416238.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/playable_races_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/kubewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/48848357829.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/watchop_fairy_tail_episode.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/81590985146.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/49458310335.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/2335113976.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/88295203380.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9267/files/43399521958.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/xuriboxozulorogoditop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b805.bin
bd3b7bdff6af22adc8868f0605c35fc3ce1ea3e9a740b573414758f590d37ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 5480 bytes
font_01_sfnt_off0000cab1.bin
ffb37730ff6e65bc397a343a3ddc7f48569abe723a5cc3780176ef3b823af95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.